Astronomy and Cosmology

3687 topics in this forum

1. Bootes void

   By Bmpbmp1975, February 17, 2020
   • 16 replies
   • 2.3k views
   • 
   • Strange
   • February 23, 2020

2. Tachyons and Superluminal motion:

   By beecee, February 16, 2020
   • 11 replies
   • 1.2k views
   • 
   • Mordred
   • February 19, 2020

3. Vacuum decay theory questions

   By Bmpbmp1975, February 18, 2020
   • 15 replies
   • 1.2k views
   • 
   • Phi for All
   • February 18, 2020

4. Is the Earth close to the center of the Universe ? 1 2

   By MaximT, January 16, 2020
   • 25 replies
   • 34.1k views
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   • beecee
   • February 18, 2020

5. Apep

   By Bmpbmp1975, February 16, 2020
   • 20 replies
   • 1.6k views
   • 
   • Bmpbmp1975
   • February 16, 2020

6. Brown Dwarfs

   By Bmpbmp1975, February 14, 2020
   • 10 replies
   • 1.2k views
   • 
   • Airbrush
   • February 16, 2020

7. Star older than universe

   By Bmpbmp1975, February 14, 2020
   • 9 replies
   • 1.3k views
   • 
   • dimreepr
   • February 16, 2020

8. Betelguese dimming

   By Bmpbmp1975, February 15, 2020
   • 3 replies
   • 703 views
   • 
   • swansont
   • February 16, 2020

9. Apep

   By Bmpbmp1975, February 15, 2020
   • 1 reply
   • 730 views
   • 
   • swansont
   • February 15, 2020

10. Dead galaxy questions 1 2 3 4 7

    By Bmpbmp1975, February 11, 2020
    • 156 replies
    • 18.4k views
    • 
    • Phi for All
    • February 15, 2020

11. The Way to See Behind The Moon

    By Ritzier, February 5, 2020
    • 2 replies
    • 974 views
    • 
    • Airbrush
    • February 15, 2020

12. Biggest Cannon in the Universe 3c186

    By Airbrush, November 30, 2019
    • 6 replies
    • 1.4k views
    • 
    • Strange
    • February 11, 2020

13. Need help understanding what an alleged physicist is saying about Flat Earth

    By cisjd.del, January 31, 2020
    • 24 replies
    • 1.9k views
    • 
    • Markus Hanke
    • February 1, 2020

14. Big Bang and Dark Matter - doubts

    By ravell, January 27, 2020
    • 1 reply
    • 810 views
    • 
    • swansont
    • January 27, 2020

15. Rocket propulsion and economics (split from Solve the climate crisis: A thought experiment)

    By LaurieAG, January 24, 2020
    • 1 reply
    • 602 views
    • 
    • LaurieAG
    • January 24, 2020

16. Do we have any way of taming dark matter?

    By Calebeano, January 18, 2020
    • 3 replies
    • 891 views
    • 
    • Endy0816
    • January 18, 2020

17. I finally found an accurate article on the speed of universal expansion 1 2 3

    By Angelo, January 10, 2020
    • 58 replies
    • 24.8k views
    • 
    • MaximT
    • January 16, 2020

18. If there was a big bang 14 or so billion years ago and all mass

    By Angelo, January 7, 2020
    • 14 replies
    • 1.4k views
    • 
    • Mordred
    • January 8, 2020

19. Plants in Super Habitable Exoplanets Could Look Purple

    By alfa015, December 31, 2019
    • 11 replies
    • 1.2k views
    • 
    • Airbrush
    • January 4, 2020

20. Stellar engine

    By Curious layman, January 1, 2020
    • 15 replies
    • 2.3k views
    • 
    • J.C.MacSwell
    • January 3, 2020

21. Can we see a correlation between the Cosmic microwave background map and the visible universe?

    By Blind Watchmaker, December 23, 2019
    • 14 replies
    • 1.4k views
    • 
    • iNow
    • December 24, 2019

22. Size a solution to Fermi Paradox? 1 2 3 4

    By coderage9100, November 16, 2018
    • 98 replies
    • 11.1k views
    • 
    • dimreepr
    • December 24, 2019

23. What was the Singularity point before the Big Bang?

    By Blind Watchmaker, December 23, 2019
    • 7 replies
    • 1.1k views
    • 
    • Strange
    • December 24, 2019

24. Inside The 24/7 Search For Another Habitable Planet Within 100 Light Years Of Earth

    By alfa015, November 26, 2019
    • 1 reply
    • 765 views
    • 
    • Airbrush
    • November 28, 2019

25. The Square Kilometre Array

    By alfa015, November 15, 2019
    • 0 replies
    • 857 views
    • 
    • alfa015
    • November 15, 2019